전략편집기 수정

frontend/src/components/strategyEditor/PaletteDragOverlay.tsx

@@ -10,18 +10,24 @@ import {
 } from '../../utils/paletteDragSession';
 
 /**
- * Tauri WebView — 드래그 중 전체 화면 overlay 가 pointer 이벤트·drop 을 수신
+ * Tauri WebView — 드래그 overlay (라벨 위치는 ref 갱신, move 마다 React re-render 없음)
  */
 export default function PaletteDragOverlay() {
   const [session, setSession] = useState<PaletteDragOverlaySession | null>(null);
-  const [cursor, setCursor] = useState({ x: 0, y: 0 });
   const overlayRef = useRef<HTMLDivElement | null>(null);
+  const labelRef = useRef<HTMLDivElement | null>(null);
 
   useEffect(() => {
     registerPaletteDragOverlay({
       mount: next => {
-        setCursor({ x: next.x, y: next.y });
         setSession(next);
+        requestAnimationFrame(() => {
+          const label = labelRef.current;
+          if (label) {
+            label.style.left = `${next.x}px`;
+            label.style.top = `${next.y}px`;
+          }
+        });
       },
       unmount: () => setSession(null),
       bindElement: el => {
@@ -41,7 +47,7 @@ export default function PaletteDragOverlay() {
     try {
       overlayRef.current.setPointerCapture(session.pointerId);
     } catch {
-      /* body capture fallback */
+      /* ignore */
     }
   }, [session]);
 
@@ -49,7 +55,11 @@ export default function PaletteDragOverlay() {
     if (!session || e.pointerId !== session.pointerId) return;
     e.preventDefault();
     e.stopPropagation();
-    setCursor({ x: e.clientX, y: e.clientY });
+    const label = labelRef.current;
+    if (label) {
+      label.style.left = `${e.clientX}px`;
+      label.style.top = `${e.clientY}px`;
+    }
     notifyPaletteDragMove(e.clientX, e.clientY);
   }, [session]);
 
@@ -78,8 +88,9 @@ export default function PaletteDragOverlay() {
       onPointerCancel={onPointerCancel}
     >
       <div
+        ref={labelRef}
         className="se-palette-drag-overlay-label"
-        style={{ left: cursor.x, top: cursor.y }}
+        style={{ left: session.x, top: session.y }}
       >
         {session.payload.label}
       </div>

frontend/src/components/strategyEditor/StrategyEditorCanvas.tsx

@@ -1281,16 +1281,22 @@ function StrategyEditorCanvasInner({
   updatePreviewRef.current = updateDropPreview;
   const resolveDropFromClientRef = useRef(resolveDropFromClient);
   resolveDropFromClientRef.current = resolveDropFromClient;
+  const lastPreviewAnchorRef = useRef<string | null>(null);
 
   useEffect(() => {
     if (!needsPointerPaletteDrag()) return;
     return subscribePaletteDrag((ev: PaletteDragEvent) => {
       if (ev.phase === 'move') {
         if (!isOverStrategyBuilder(ev.x, ev.y)) {
+          if (lastPreviewAnchorRef.current != null) {
+            lastPreviewAnchorRef.current = null;
             clearPreviewRef.current();
+          }
           return;
         }
         const { flowPos, anchorId } = resolveDropFromClientRef.current(ev.x, ev.y);
+        if (anchorId === lastPreviewAnchorRef.current) return;
+        lastPreviewAnchorRef.current = anchorId;
         if (anchorId) {
           updatePreviewRef.current(anchorId, flowPos);
         } else {
@@ -1298,6 +1304,9 @@ function StrategyEditorCanvasInner({
         }
         return;
       }
+      if (ev.phase === 'end' || ev.phase === 'cancel') {
+        lastPreviewAnchorRef.current = null;
+      }
       if (ev.phase === 'cancel') {
         clearPreviewRef.current();
       }

frontend/src/components/strategyEditor/StrategyListEditor.tsx

@@ -1,4 +1,4 @@
-import React, { useCallback, useMemo, useState } from 'react';
+import React, { useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react';
 import type { LogicNode } from '../../utils/strategyTypes';
 import {
   CondEditor,
@@ -31,6 +31,15 @@ import {
 import StartTimeframeCheckboxes from './StartTimeframeCheckboxes';
 import LogicGateOpToggle from './LogicGateOpToggle';
 import { formatStartCandleTypesLabel } from '../../utils/strategyStartNodes';
+import { buildSidewaysFilterNode } from '../../utils/sidewaysFilterPaletteStorage';
+import { isOverListEditor } from '../../utils/flowScreenProjection';
+import {
+  findPaletteDropKeyAtPoint,
+  needsPointerPaletteDrag,
+  setPaletteDragDropHandler,
+  subscribePaletteDrag,
+  type PaletteDragPayload,
+} from '../../utils/paletteDragSession';
 
 const NODE_COLORS: Record<string, string> = {
   AND: '#4caf50',
@@ -134,6 +143,7 @@ const TreeNodeComp: React.FC<TreeNodeProps> = ({
     <div
       className={`sp-tree-node${dragOverKey === nodeDropKey ? ' sp-tree-node--over' : ''}`}
       style={{ marginLeft: depth > 0 ? 12 : 0 }}
+      data-palette-drop-key={isLogic ? nodeDropKey : undefined}
       onDragOver={handleDragOver}
       onDragLeave={handleDragLeave}
       onDrop={handleDrop}
@@ -327,6 +337,7 @@ function StartSectionBlock({
 
       <div
         className={`sp-start-body${dragOverKey === sectionDropKey ? ' sp-start-body--over' : ''}`}
+        data-palette-drop-key={sectionDropKey}
         onDragOver={e => {
           e.preventDefault();
           e.stopPropagation();
@@ -380,8 +391,15 @@ export default function StrategyListEditor({
   orphans = [],
 }: Props) {
   const [dragOverKey, setDragOverKey] = useState<string | null>(null);
+  const dragOverKeyRef = useRef<string | null>(null);
   const sections = collectStartSections(editorState);
 
+  const setDragOverKeyThrottled = useCallback((key: string | null) => {
+    if (dragOverKeyRef.current === key) return;
+    dragOverKeyRef.current = key;
+    setDragOverKey(key);
+  }, []);
+
   const handleAddStart = useCallback(() => {
     if (onAddStart) {
       onAddStart();
@@ -406,6 +424,92 @@ export default function StrategyListEditor({
     }
   }, [editorState, onEditorStateChange, onOrphansChange, orphans]);
 
+  const resolvePaletteNode = useCallback((
+    data: { type: string; value: string; label: string; composite?: boolean },
+  ) => {
+    if (data.type === 'sidewaysFilter') {
+      return buildSidewaysFilterNode(data.value, def);
+    }
+    return makeNode(data.type, data.value, signalTab, def, makeNodeOptionsFromPalette(data));
+  }, [signalTab, def]);
+
+  const applyPaletteDropAtKey = useCallback((
+    dropKey: string | null,
+    data: PaletteDragPayload,
+  ) => {
+    if (!dropKey) return;
+    if (dropKey === LIST_DROP_KEY) {
+      if (data.type === 'start') handleAddStart();
+      return;
+    }
+
+    const rootMatch = dropKey.match(/^([^:]+):__root__$/);
+    const nodeMatch = dropKey.match(/^([^:]+):([^:]+)$/);
+    const startId = rootMatch?.[1] ?? nodeMatch?.[1];
+    const targetId = rootMatch ? null : nodeMatch?.[2];
+    if (!startId) return;
+
+    if (data.type === 'start') {
+      handleAddStart();
+      return;
+    }
+
+    const section = collectStartSections(editorState).find(s => s.startId === startId);
+    if (!section) return;
+
+    const newNode = resolvePaletteNode(data);
+    if (!newNode) return;
+
+    const root = section.root;
+    if (!root) {
+      handleRootChange(startId, newNode);
+      return;
+    }
+    if (!targetId) {
+      handleRootChange(startId, mergeAtRoot(root, newNode, data.type === 'operator'));
+      return;
+    }
+    handleRootChange(startId, addChild(root, targetId, newNode));
+  }, [
+    editorState,
+    handleAddStart,
+    handleRootChange,
+    resolvePaletteNode,
+  ]);
+
+  const applyDropRef = useRef(applyPaletteDropAtKey);
+  applyDropRef.current = applyPaletteDropAtKey;
+
+  useLayoutEffect(() => {
+    if (!needsPointerPaletteDrag()) return undefined;
+    setPaletteDragDropHandler(ev => {
+      if (ev.phase !== 'end') return;
+      dragOverKeyRef.current = null;
+      setDragOverKey(null);
+      if (!isOverListEditor(ev.x, ev.y)) return;
+      applyDropRef.current(findPaletteDropKeyAtPoint(ev.x, ev.y), ev.payload);
+    });
+    return () => setPaletteDragDropHandler(null);
+  }, []);
+
+  useEffect(() => {
+    if (!needsPointerPaletteDrag()) return;
+    return subscribePaletteDrag(ev => {
+      if (ev.phase === 'move') {
+        if (!isOverListEditor(ev.x, ev.y)) {
+          setDragOverKeyThrottled(null);
+          return;
+        }
+        setDragOverKeyThrottled(findPaletteDropKeyAtPoint(ev.x, ev.y));
+        return;
+      }
+      if (ev.phase === 'cancel') {
+        dragOverKeyRef.current = null;
+        setDragOverKey(null);
+      }
+    });
+  }, [setDragOverKeyThrottled]);
+
   const handleListDragOver = (e: React.DragEvent) => {
     e.preventDefault();
     e.dataTransfer.dropEffect = 'copy';
@@ -429,6 +533,7 @@ export default function StrategyListEditor({
   return (
     <div
       className={`se-list-editor sp-dropzone${dragOverKey === LIST_DROP_KEY ? ' se-list-editor--over' : ''}`}
+      data-palette-drop-key={LIST_DROP_KEY}
       onDragOver={handleListDragOver}
       onDragLeave={() => setDragOverKey(null)}
       onDrop={handleListDrop}

frontend/src/utils/flowScreenProjection.ts

@@ -72,6 +72,14 @@ export function projectScreenToFlowPosition(
   );
 }
 
+/** 목록 방식 편집기 위인지 */
+export function isOverListEditor(clientX: number, clientY: number): boolean {
+  for (const el of elementsUnderDragPoint(clientX, clientY)) {
+    if (el.closest('.se-list-editor')) return true;
+  }
+  return false;
+}
+
 /** 팔레트 드롭 — 전략 빌더 캔버스 위인지 */
 export function isOverStrategyBuilder(clientX: number, clientY: number): boolean {
   for (const el of elementsUnderDragPoint(clientX, clientY)) {

frontend/src/utils/paletteDragSession.ts

@@ -1,6 +1,7 @@
 /**
  * Desktop(Tauri) — HTML5 DnD 대신 pointer + 전체화면 overlay 드래그
  */
+import { elementsUnderDragPoint } from './flowScreenProjection';
 import { isDesktop } from './platform';
 
 export type PaletteDragPayload = Record<string, unknown> & {
@@ -43,6 +44,8 @@ let overlayController: OverlayController | null = null;
 let overlayElement: HTMLElement | null = null;
 let listeners = new Set<PaletteDragListener>();
 let dropHandler: PaletteDropHandler | null = null;
+let moveRafId: number | null = null;
+let pendingMove: { x: number; y: number } | null = null;
 
 export function needsPointerPaletteDrag(): boolean {
   return isDesktop();
@@ -88,6 +91,11 @@ function dispatchEnd(xy: { x: number; y: number }, payload: PaletteDragPayload)
 function cleanupDrag() {
   activePayload = null;
   activePointerId = null;
+  pendingMove = null;
+  if (moveRafId != null) {
+    cancelAnimationFrame(moveRafId);
+    moveRafId = null;
+  }
   document.body.classList.remove('se-palette-drag-active');
   overlayController?.unmount();
   document.querySelectorAll('.se-palette-drag-ghost').forEach(el => el.remove());
@@ -107,7 +115,15 @@ function finishDrag(phase: 'end' | 'cancel', xy: { x: number; y: number }) {
 
 export function notifyPaletteDragMove(clientX: number, clientY: number) {
   if (!activePayload) return;
-  emit({ phase: 'move', x: clientX, y: clientY, payload: activePayload });
+  pendingMove = { x: clientX, y: clientY };
+  if (moveRafId != null) return;
+  moveRafId = requestAnimationFrame(() => {
+    moveRafId = null;
+    if (!pendingMove || !activePayload) return;
+    const { x, y } = pendingMove;
+    pendingMove = null;
+    emit({ phase: 'move', x, y, payload: activePayload });
+  });
 }
 
 export function notifyPaletteDragEnd(clientX: number, clientY: number) {
@@ -229,8 +245,9 @@ export function readPaletteHtmlDragData(e: React.DragEvent): PaletteDragPayload
 }
 
 export function findPaletteDropKeyAtPoint(x: number, y: number): string | null {
-  const el = document.elementFromPoint(x, y);
-  if (!el) return null;
+  for (const el of elementsUnderDragPoint(x, y)) {
     const host = el.closest('[data-palette-drop-key]') as HTMLElement | null;
-  return host?.dataset.paletteDropKey ?? null;
+    if (host?.dataset.paletteDropKey) return host.dataset.paletteDropKey;
+  }
+  return null;
 }